Vidalista is used to treat pulmonary arterial hypertension and male erectile dysfunction. It helps men achieve an erection by increasing blood flow to the penis. It can be taken either with or without food. It must be taken exactly as prescribed by your physician. Only when you are sexually stimulated will the ED medication help you achieve an erection. Each person has a different time frame for working, but it often takes 30 to 60 minutes. Take it only if your doctor has recommended it and you need it. Avoid chewing, crushing, or breaking it. It is preferable to take it with or without food.